Cubicle 7 was empty, but there was a queue anyway. Sally wanted to investigate, although Mary told her not to. When she lifted the seat, the toilet was full of shit and she shouted in disgust. Mary laughed and yelled "Kinder surprise!"

The act where you a girl would clean her anus in preparation for oral butt sex, and while cleaning her anus, fills it with nutella. When her partner proceeds to eat her ass, they will eat the nutella, making it a kinder surprise.

The term "Kinder surprise" refers to a black person trying to act as if they are white, hence why a Kinder surprise is black on the outside and white on the inside.
For example; Jess Mauboy, thinking she is soo cool with the Telstra ads.

Sam: Did you see that Kinder surprise over there?
Thalya: Yea she thought she was soo white with all her courage and intelligence!